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Activation Energy and Catalyst in Chemical Reactions

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Activation Energy and Catalyst in Chemical Reactions

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Questions and Answers

What is the role of enzymes in chemical reactions?

Slowing down chemical reactions

Breaking down substrates

Speeding up specific chemical reactions (correct)

Producing more substrates

Where does the substrate bind to the enzyme during a reaction?

Passive location

Active site (correct)

Inactive location

Inactive site

What is the term used for the reactant in biochemical reactions?

Enzyme

Product

Complex

Substrate (correct)

What happens to the product after it is formed in an enzyme-catalyzed reaction?

It dissociates and the enzyme is free to bind another substrate Signup and view all the answers

In the context of activation energy, what does Ea represent?

Activation energy of the reaction Signup and view all the answers

What is the main factor that determines the speed of reaction in the Arrhenius equation?

Temperature Signup and view all the answers

What is the minimum energy required to start a chemical reaction called?

Activation energy Signup and view all the answers

Which of the following statements about collision theory is true?

Molecules must collide in the correct orientation with kinetic energy greater than the activation energy for a reaction to occur. Signup and view all the answers

What is the transition state in a chemical reaction?

A high energy, unstable state where the molecules are contorted or deformed. Signup and view all the answers

What is the role of a catalyst in a chemical reaction?

To lower the activation energy of the reaction. Signup and view all the answers

Which of the following statements about catalysts is true?

Catalysts are not consumed during the course of a chemical reaction. Signup and view all the answers

Which of the following energy types must molecules possess to undergo a chemical reaction?

Both kinetic and potential energy Signup and view all the answers